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| Slag erosion resistance and hanging mechanism for the refractory in blast furnace hearth |
| ZHANG Jian-liang1，WANG Zhi-yu1，JIAO Ke-xin1，WANG Cong1，ZHAO Yong-an2 |
1. School of Metallurgical and Ecological Engineering， University of Science and Technology Beijing， Beijing 100083， China
2. Technology Division， Henan Winna Industrial Group Co.， Ltd.， Gongyi 451250， Henan， China |
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Abstract The slag corrosion resistance and the adherent slag performance of carbon-based brick and corundum-based brick were investigated. The slag corrosion mechanisms of carbon-based brick and corundum-based brick were studied at 1 500 ℃. The microstructure and the phase composition of the corrosion interface were respectively analyzed by SEM-EDS and XRD. Then the adherent slag mechanisms of carbon-based brick and corundum-based brick were analyzed. The results show that the spinel (MA) can be generated by the reaction between blast furnace slag and corundum-based brick on the corrosion interface. Then the corrosion process is hindered by the generated spinel (MA) and some high melting point phases (Al2O3，SiC) in corundum-based brick. However， the high melting point phases cannot be formed on carbon-based brick surface. A small number of the points bonding blast furnace slag and carbon-based brick lead to the poor bonding strength， and then the slag crust periodically falls off from the carbon-based brick surface.
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Received: 05 January 2015
Published: 29 October 2015
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2015, Vol. 50 
